Kihwal Lee created HDFS-8150:
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Summary: Make getFileChecksum fail for blocks under construction
Key: HDFS-8150
URL: https://issues.apache.org/jira/browse/HDFS-8150
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Kihwal Lee
Priority: Critical
We have seen the cases of validating data copy using checksum then the content
of target changing. It turns out the target wasn't closed successfully, so it
was still under-construction. One hour later, a lease recovery kicked in and
truncated the block.
Although this can be prevented in many ways, if there is no valid use case for
getting file checksum from under-construction blocks, can it be disabled? E.g.
Datanode can throw an exception if the replica is not in the finalized state.
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